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Commitments, Contingencies and Litigation - (Additional Information) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2019 | Jun. 30, 2017 | Feb. 29, 2016 | Jun. 30, 2019 | Mar. 31, 2019
Commitments, Contingencies And Litigation [Line Items] |  |  |  |  |
Provision for environmental liabilities |  |  |  | $ 1,060 | $ 1,081
Belgium Anti-Competition Proceeding |  |  |  |  |
Commitments, Contingencies And Litigation [Line Items] |  |  |  |  |
Penalties paid relating to anti-competition investigations |  |  | $ 1,962 | 1,272 |
Germany Anti-Competition Proceeding |  |  |  |  |
Commitments, Contingencies And Litigation [Line Items] |  |  |  |  |
Penalties paid relating to anti-competition investigations |  | $ 14,811 |  |  |
Reserves for anti-competition investigations |  |  |  | $ 0 | $ 7,258
Litigation Settlement, Amount Awarded to Other Party | $ 7,258 |  |  |  |

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